WO2021013423A1 - Système de piles à combustible - Google Patents

Système de piles à combustible Download PDF

Info

Publication number
WO2021013423A1
WO2021013423A1 PCT/EP2020/065926 EP2020065926W WO2021013423A1 WO 2021013423 A1 WO2021013423 A1 WO 2021013423A1 EP 2020065926 W EP2020065926 W EP 2020065926W WO 2021013423 A1 WO2021013423 A1 WO 2021013423A1
Authority
WO
WIPO (PCT)
Prior art keywords
fuel cell
housing
intermediate piece
cell system
busbar
Prior art date
Application number
PCT/EP2020/065926
Other languages
German (de)
English (en)
Inventor
Friedrich Howey
Dirk SCHNITTGER
Rolf-Peter Essling
Wolfgang Weissgerber
Original Assignee
Robert Bosch Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Priority to US17/627,882 priority Critical patent/US20220255108A1/en
Publication of WO2021013423A1 publication Critical patent/WO2021013423A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/24—Grouping of fuel cells, e.g. stacking of fuel cells
    • H01M8/2465—Details of groupings of fuel cells
    • H01M8/247—Arrangements for tightening a stack, for accommodation of a stack in a tank or for assembling different tanks
    • H01M8/2475—Enclosures, casings or containers of fuel cell stacks
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2250/00—Fuel cells for particular applications; Specific features of fuel cell system
    • H01M2250/20—Fuel cells in motive systems, e.g. vehicle, ship, plane
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2250/00—Fuel cells for particular applications; Specific features of fuel cell system
    • H01M2250/30—Fuel cells in portable systems, e.g. mobile phone, laptop
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02B90/10—Applications of fuel cells in buildings
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/50—Fuel cells
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/40—Application of hydrogen technology to transportation, e.g. using fuel cells

Definitions

  • the present invention relates to a fuel cell system, comprising a fuel cell stack accommodated in a first housing and an energy supply unit accommodated in a second housing.
  • Fuel cell stack supplied with energy that is, connected to a power grid of the system.
  • the connection can be established using a high-voltage plug or a simple high-voltage cable, for example. Since the fuel cell stack is usually surrounded by a housing, the plug or the cable must be passed through the housing.
  • the fuel cell stack can also be connected to the system's power grid via a
  • PDU Power Distribution Unit
  • the proposed fuel cell system comprises a fuel cell stack accommodated in a first housing and a power supply unit accommodated in a second housing.
  • the two housings are connected or can be connected in such a way that openings provided in the housings are opposite one another and at least partially overlap.
  • an intermediate piece is arranged in the area of two opposing and at least partially overlapping openings which surrounds a pin-shaped or sleeve-shaped contact element, the intermediate piece being the contact element directly or indirectly via a
  • Sealing ring encloses watertight and at least electrically insulated from one of the two housings.
  • the intermediate piece of the proposed fuel cell system has several functions, namely that of sealing and electrical insulation.
  • the intermediate piece is therefore made - at least in some areas - of a waterproof and electrically insulating material, for example
  • the seal with respect to the pin-shaped or sleeve-shaped contact element which is used for electrical contacting and is therefore electrically conductive, can be effected by the intermediate piece itself or by a sealing ring. If the sealing ring is omitted, the intermediate piece is preferably in contact with the contact element via a radial prestress.
  • the electrical insulation of the contact element from at least one of the two housings by the intermediate piece requires that the intermediate piece make direct or indirect contact with the at least one, for example via a sealing element
  • the intermediate piece can also seal the housing.
  • the intermediate piece therefore connects directly or indirectly via a circumferential sealing element at least one case waterproof.
  • at least one further sealing plane is provided on the intermediate piece, in which sealing contact with one of the two housings is realized directly or indirectly via a circumferential sealing element.
  • At least two further sealing planes are preferably provided, in the area in which the intermediate piece is in sealing contact with both housings, either directly or indirectly via a circumferential sealing element.
  • the sealing contact between the intermediate piece and a housing is established indirectly via a sealing element, it is proposed that the sealing element be received in a circumferential groove of the intermediate piece. By receiving the sealing element in a groove, the sealing element is secured in its position.
  • the intermediate piece has a single or multiple stepped outer contour and forms at least one circumferential shoulder.
  • the intermediate piece can be supported on at least one housing via the at least one shoulder. If this is the case, the intermediate piece engages around the housing, so that the sealing effect is also improved. If several sealing planes are formed on the intermediate piece, these can be distributed over different circumferential areas of the intermediate piece. Alternatively or in addition, an axial seal can be implemented in the area of a shoulder.
  • At least one housing preferably has a collar section delimiting the opening.
  • the collar section stabilizes this
  • Both housings therefore preferably each have a collar section delimiting the opening. Furthermore - if desired - with the help of a
  • Collar section of the sealing contact between the intermediate piece and the respective housing are enlarged. If the sealing contact is established indirectly via a circumferential sealing element, the collar section enlarges the contact surface for the sealing element so that the position of the intermediate piece in relation to the housing can be varied during assembly. If both housings each have a collar section delimiting the opening, they can also interact in a sealing manner, so that, if necessary, a sealing plane on the intermediate piece can be omitted. In this case, the two collar sections are preferably arranged on opposite sides of the two housings, one collar section in the other
  • Collar section engages so that directly or indirectly via a
  • Sealing element a circumferential sealing contact is formed.
  • the pin-shaped or sleeve-shaped contact element at least one end on one
  • Busbar is supported for making electrical contact with the fuel cell stack and / or the power supply unit.
  • at least the end facing the fuel cell stack is
  • a pull rod which is locked at at least one end, is preferably guided through the sleeve-shaped contact element and the at least one busbar. With the help of the locked pull rod, the at least one busbar can be pulled to the contact element. In this way, an electrical contact between the at least one busbar and the sleeve-shaped contact element is permanently ensured. At the same time, the pull rod facilitates assembly.
  • a sealing ring is preferably arranged between the pull rod and the contact element.
  • the sealing ring ensures that no water can penetrate into the housing via the annular gap between the pull rod and the contact element.
  • the pull rod can be inserted into at least one end
  • Counter element be screwed in or pressed in.
  • the counter element can, for example, be a nut into which the pull rod is screwed.
  • the power rail can be attached to the
  • the mother forms an abutment.
  • the end of the pull rod can be pressed into a ring or into a sleeve.
  • the press-in depth can be used to ensure that the busbar comes to rest on the contact element.
  • the contact element is advantageously supported at its two ends on a busbar and a pull rod is inserted into the contact element and the two busbars so that the pull rod protrudes beyond the busbars.
  • a first end of the tie rod can be screwed or pressed into a first counter element. After the assembly has been completed, another counter element can be screwed or pressed onto the other end of the tie rod.
  • the pull rod with the help of the two counter elements holds all live parts together.
  • the pull rod can also be designed in one piece with a counter element. This then forms an abutment that is firmly connected, in particular rotatably connected, to the pull rod. After the tie rod has been assembled, another counter element can be screwed or pressed onto the free end in order to attach the at least one busbar to the
  • this is preferably
  • At least one counter element made of a metallic material. This means that the counter element is electrically conductive.
  • Counter element is surrounded by an insulating body.
  • the insulating body has the effect that the counter element is electrically isolated. It is further proposed that the counter element in a direction parallel to the pull rod through an end section of the busbar in the insulating body that projects into the insulating body is held. This means that the counter element is first inserted into the insulating body from the front. Then the free end of the busbar is pushed into the insulating body from the side and the sleeve-shaped one
  • the contact element is placed on the power rail from the front.
  • the pull rod is then screwed or pressed into the counter element through the sleeve-shaped contact element and the busbar, so that all parts including the insulating body are retained in a captive manner.
  • the counter element is secured against rotation by the insulating body.
  • the counter element can be a nut which has an angular, in particular hexagonal, outer contour.
  • the fuel cell stack preferably has two voltage connections for a plus and a minus pole.
  • the voltage connections are each connected in an electrically conductive manner to a busbar of the power supply unit via a busbar and a pin-shaped or sleeve-shaped contact element.
  • the intermediate piece In the intermediate piece, the high voltage potentials between the two poles and relative to the housings are adequately protected. Furthermore, the intermediate piece prevents water from entering the housing via the various sealing levels.
  • the intermediate piece is preferably made of a water and
  • Gas-impermeable material manufactured so that the intermediate piece at the same time prevents gas exchange between the two housings. Because during operation there is usually a higher humidity in the housing in which the fuel cell stack is received than in the housing
  • Energy supply unit which is due to the fact that moisture or water leaks from the fuel cell stack. Hydrogen can also be present in the housing of the fuel cell stack. This must not get into the housing of the power supply unit because here There are ignition sources and an ignitable mixture could develop.
  • the sealing effected with the aid of the intermediate piece ensures that the electronic components of the power supply unit are not damaged and / or are not damaged by moisture
  • FIG. 1 shows a schematic longitudinal section through a fuel cell system according to the invention according to a first preferred embodiment
  • FIG. 2 shows an enlarged section of FIG. 1 in the area of an intermediate piece inserted between two housings
  • FIG. 4 shows a schematic longitudinal section through a fuel cell system according to the invention according to a second preferred embodiment
  • FIG. 5 shows a schematic longitudinal section through a fuel cell system according to the invention according to a third preferred embodiment.
  • the fuel cell system shown in FIG. 1 comprises a
  • Fuel cell stack 2 which is arranged on a base plate 25 and surrounded by a housing 1.
  • the fuel cell stack 2 has two sides
  • Voltage connections 20 are each connected to a busbar 14. At the free ends of the busbars 14 a pin-shaped or sleeve-shaped contact element 7 is supported, which the electrical contact with
  • contact elements 7 are guided out of the housing 1 via an opening 4 formed laterally in the housing 1.
  • the energy supply unit has a housing 3 which is screwed laterally to the housing 1 of the fuel cell stack 2 and has an opening 5 which is opposite the opening 4 of the housing 1.
  • the intermediate piece 6 is made of an electrically insulating material which is impervious to water and gas.
  • the intermediate piece 6 lies against the two contact elements 7 in a sealing manner via sealing rings 8.
  • Intermediate piece 6 has a stepped outer contour, so that a circumferential
  • Paragraph 11 is formed, which separates two different peripheral areas.
  • the dimensions of the two circumferential areas are adapted to the dimensions of the two openings 4, 5.
  • a circumferential groove 10 for receiving a circumferential sealing element 9 is formed in each circumferential area.
  • the intermediate piece 6 has two receptacles 21 for the contact elements 7.
  • the dimensions of the receptacles 21 are therefore adapted to the dimensions of the contact elements 7.
  • the dimensions of the receptacles 21 are therefore adapted to the dimensions of the contact elements 7.
  • Intermediate piece 6 also have only one receptacle 21 for a contact element 7.
  • each contact element 7 can be surrounded by its own intermediate piece 6 and be electrically isolated from the housings 1, 3.
  • Two openings 4 and two openings 5 are then provided in each of the two housings 1, 3.
  • the two intermediate pieces 6 can then each be designed as a rotationally symmetrical body.
  • the openings 4, 5 formed in the housings 1, 3 are each delimited by a collar section 12, 13.
  • the collar sections 12, 13 increase the rigidity of the
  • Collar sections 12, 13 from enlarged contact surfaces for the circumferential sealing elements 9, which are received in the grooves 10 of the intermediate piece 6.
  • the fuel cell system is shown in FIG. 4.
  • the housing 3 of the energy supply unit has two collar sections 13, 23 which are arranged on opposite sides.
  • the collar section 23 thus faces the collar section 12 of the first housing 1.
  • the dimensions of the collar sections 23, 12 are selected such that the collar section 12 of the first housing 1 engages in the collar section 23.
  • the intermediate piece 6 accordingly has only one circumferential groove 10 with a sealing element 9 inserted therein, which rests sealingly on the housing 3 of the power supply unit.
  • the fuel cell system is shown in FIG. 5.
  • the contact elements 7 are designed in the form of a sleeve and are supported at their two ends on a busbar 14, 15. By the contact elements 7 and the
  • Busbars 14, 15 are tie rods 16 out and connected at both ends with counter elements 17 in the form of nuts. Sealing rings 17 arranged on the tie rods 16 seal the gap between the tie rods 16 and the contact elements 7, so that this embodiment is also watertight and gas-tight.
  • the counter elements 18 or nuts which face the fuel cell stack 2 are surrounded by an insulating body 19 which is used for electrical insulation. At the same time, the insulating body 19 serves as an assembly aid. The insulating body 19 including the nuts is held captive by the laterally engaging busbars 14.
  • the nuts are inserted into the insulating body 19 from the front.
  • the insulating body 19 is then pushed onto the end sections of the two busbars 14 from the side.
  • the intermediate piece 6 with the two contact elements 7 can be inserted into the opening 4 of the housing 1, so that the sealing element 9 seals on the
  • Collar portion 12 of the housing 1 rests. Through the contact elements 7 and the busbars 14, the tie rods 16 are inserted and into the im
  • Insulating body 19 screwed nuts received. Then the busbars 15 can be placed and the other nuts screwed on. To generate a torque, a recess 24 for receiving a tool is provided on the front side in each of the tie rods 16.
  • the two housings 1, 3 can also be designed analogously to the embodiment in FIG. Furthermore, the intermediate piece 6 can have only one receptacle 21 for a single contact element 7.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Fuel Cell (AREA)

Abstract

La présente invention concerne un système de piles à combustible, comportant un empilement de piles à combustible (2) logé dans un premier boîtier (1) et une unité de fourniture d'énergie logée dans un second boîtier (3), les deux boîtiers (1, 3) étant reliés ou pouvant être reliés de manière que des ouvertures (4, 5), disposées dans les boîtiers (1, 3), se trouvent en face les unes des autres et se recouvrent au moins par secteur. Selon la présente invention, une pièce intermédiaire (6), qui entoure un élément de contact (7) en forme de broche ou de douille, est située dans la zone de deux ouvertures (4, 5) étant en face l'une de l'autre et se recouvrant au moins par secteur, la pièce intermédiaire (6) entourant d'une manière étanche à l'eau l'élément de contact (7) directement ou indirectement par le biais d'une bague d'étanchéité (8) et l'isolant électriquement au moins par rapport à un des deux boîtiers (1, 3).
PCT/EP2020/065926 2019-07-19 2020-06-09 Système de piles à combustible WO2021013423A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US17/627,882 US20220255108A1 (en) 2019-07-19 2020-06-09 Fuel cell system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019210717.6A DE102019210717A1 (de) 2019-07-19 2019-07-19 Brennstoffzellensystem
DE102019210717.6 2019-07-19

Publications (1)

Publication Number Publication Date
WO2021013423A1 true WO2021013423A1 (fr) 2021-01-28

Family

ID=71096676

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2020/065926 WO2021013423A1 (fr) 2019-07-19 2020-06-09 Système de piles à combustible

Country Status (3)

Country Link
US (1) US20220255108A1 (fr)
DE (1) DE102019210717A1 (fr)
WO (1) WO2021013423A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1029238B1 (fr) * 2022-07-26 2023-10-12 Univ Zhengzhou Aeronautics Un dispositif de contrôle pour le système de propulsion électrique à batterie à combustible à hydrogène

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007021018A1 (de) * 2007-05-04 2008-11-06 Bayerische Motoren Werke Aktiengesellschaft Anschluss zum Abgreifen der elektrischen Leistung an einer Hochtemperatur-Brennstoffzelle
DE102010006705B3 (de) * 2010-02-02 2011-04-14 Mtu Onsite Energy Gmbh Brennstoffzellenanordnung
DE102014017952A1 (de) * 2014-12-05 2016-06-09 Daimler Ag Brennstoffzellenanordnung
DE102014017953A1 (de) * 2014-12-05 2016-06-09 Daimler Ag Brennstoffzellenvorrichtung
DE102016004283A1 (de) * 2016-04-07 2017-10-12 Daimler Ag Brennstoffzellenvorrichtung

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007021018A1 (de) * 2007-05-04 2008-11-06 Bayerische Motoren Werke Aktiengesellschaft Anschluss zum Abgreifen der elektrischen Leistung an einer Hochtemperatur-Brennstoffzelle
DE102010006705B3 (de) * 2010-02-02 2011-04-14 Mtu Onsite Energy Gmbh Brennstoffzellenanordnung
DE102014017952A1 (de) * 2014-12-05 2016-06-09 Daimler Ag Brennstoffzellenanordnung
DE102014017953A1 (de) * 2014-12-05 2016-06-09 Daimler Ag Brennstoffzellenvorrichtung
DE102016004283A1 (de) * 2016-04-07 2017-10-12 Daimler Ag Brennstoffzellenvorrichtung

Also Published As

Publication number Publication date
DE102019210717A1 (de) 2021-01-21
US20220255108A1 (en) 2022-08-11

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